Change Community Events Thankyou

/**
 * This is filters the array of "errors" processed in
 * TribeCommunityEvents::outputMessage().
 *
 * Place this and the matching
 * add_filter() call in your theme functions.php file to quickly replace the
 * "Event submitted" text that is displayed by default when an event is
 * successfully submitted.
 *
 * @param $messages
 * @return array
 */
function replaceCommunitySubmitThankyou($messages) {
    $message = (array) $messages;

    $lookfor = 'Event submitted. ';
    $replaceWith = 'You guys rock! '; // Change this to whatever you think appropriate

    foreach ($messages as &$message)
        if (strpos($message['message'], $lookfor) !== false)
            $message['message'] = str_replace($lookfor, $replaceWith, $message['message']);

    return $messages;
}

// Filter the "error" messages upon form submission
add_filter('tribe_community_events_form_errors', 'replaceCommunitySubmitThankyou');